Apparatus for manufacturing composition board



May 16, 1933. c. E. IVES APPARATUS FOR MANUFACTURING COMPOSITION BOARDFiled Dec. 13, 1930 5 Sheets-Sheet l INVENTOR v C L IFFOPD E II/Ea BYMZZ ATLI'ORNEY May 16, 1933. c. E. IVES APPARATUS FOR MANUFACTURINGCOMPOSITION BOARD Filed Dec. 15, 1930 3 Sheets $heet 2 QWN WEN

INVENTOR C-L/FFOED E V56. BY 9 A'TTQRNEY7 May 16, 1933. A c. E. IVES1,909,583 I APPARATUS FOR MANUFACTURING COMPOSITION BOARD Filed Dec. 13,1930 3 Sheets-Sheet 5 ATTORN EY CLIFFORD E. IVES, OF WILMETTE, ILLINOIIII Patented May 16, 1933 PATENT oFFrcE" hairs" s'rA'rEs' S, ASSIGNOR TOUNITED STATES GYPSUIM COMPANY, OF CHICAGO, ILLENOIS, A CORPORATION OFILLINOIS APPARATUS FOR MANUFACTURING COMPOSITION BOARD Application filedDecember 13, 1930. Serial No. 502,022.

This invention relates to a composition board and the apparatus for thetreatment of the edges of moving strips of sheet material. used in saidboard, and has reference more particularly to an apparatus of the classdescribed which is suitable for chamfering, scoring and trimming theedges of a paper cover sheet used in the manufacture of gypsum board.

In the manufacture of composition boards such as gypsum boards, in whicha plastic material luiving calcined gypsum as its base, is,

introduced between paper cover sheets, it is common practice to foldthese sheets about the edges of the board so as to strengthen the sameat the edge of the boards and prevent them from being chipped or brokenin handling. In order to make boards having rathcrsharp edges, it iscustomary to score the paper cover sheets longitudinally at the bendline to permit easier bending. It is also customaiy to chamferthe edgeof the outermost folds of a paper cover sheet so that the paper will lieflat within the plane of the edge or top surface of the board andpresent a smooth appearance. It is also desirable that the chamferededge of the paper be trimmed after chamfering and scoring so that therewill be no irregular projections on the chamfered edges.

An object of this invention, therefore, is to produce an apparatus forthe combined functions of chamfering, trimming and scoring the edges ofthe paper cover sheets.

Another object of the invention is to provide a combii'ied chamfering,trimming and scoring appara us which is compact and which has a longlife without an undue maintenance cost.

A further objective of the invention is to provide a device of theclassdescribed which may be easily adjusted so that it operatesaccurately upon the edges of the paper cover sheets; also to improveapparatus for the manufacture of composition board in other respectshereinafter specified and claimed.

Reference is to be had to the accompanying drawings forming a part ofthe spec ncation, in which, V

F 1g. 1 1s a sectional view through one edge of a plaster board which isone type of board which may be made through the use of my improvedapparatus, 7 Fig. 2 is a side elevation of the apparatus for making theboard shown in Fig. 1, I

Fig. 3 is a sectional elevation through the machine taken on the line 33of Fig. 4,

Fig. 4 is an elevation, partly in section, of the improved machinelooking longitudin ally ofthe board making machine,

Fig. 5 is a sectional elevation through the machine taken on the line 55of Fig. 2, and Fig. 6 is a sectional elevation through the machinetakenon the line 6-6 of Fig.5.

One of the many types of board which can be made by the use of myimproved apparatus, is shown in Fig. 1. This board has a lower coversheet 10 and an upper cover sheet 11, the latter being provided with alongitudinal score mark 12 so that a fold 13 may be turned downwardlyand secured to an upwardly extending fold 14 formed on the lower sheet10. The inner-surface of the fold 13 is provided with a beveled orchamfered surface 15, the outer edge 16 of which is trimmed to a widthsomewhat less than the thickness of the gypsum board produced. Alongitudinal score mark 17 is formed on the upper face of the coversheet 10 adjacent the fold 14, and said fold 14 may be trimmed to thecorrect width by an apparatus more fully described in my Patent No.1,887,307,

dated November 8, 1932. The core material ming of the edge of the papercover sheet 11.,

The cover sheet 11 in the form of a continuous strip, is unwound from asupply roll not shown, and is passed about a guide roll 20 which iscarried on a shaft 21, the latter being'rota-tably mounted in bearings22 secured to framework 23 of the machine. After leaving the roll 20,the cover sheet 11 passes underneath a pair of grinding or carborundumwheels 24 each of which 1s secured to a shaft 25 having'annular flanges26 and 48 between each of which the wheels 24: are

clamped by means of a nut 27. The shaft 25 is rotatably mounted in ballbearings 28 and 29 so that the axis of the shaftexit-ends substantiallyparallel to the edge of the paper strip 11. Bearings and are mounted inthe outer wall 80 and the inner wall 81 respectively of a gear case,which is di ided into an upper gear case and a lower case or chamber 38by means of a partition The gear case nlidably supportc its bottom on asquare bar 2-56. in order to maintain the desired position of oaci gearcase 82 on bar 86, clamps 37 are provided, which are secured to thebottom of the gear cases and embrace bars 86. Screws 38 engage insuitable, threaded eyes at the adjoining edges of the clamping" members87 and serve. to draw the clamps tightly about bars 86. Suitable coreholes are formed in the walls of the gear case for coring purposes,these holes being normally closed by plugs i0 when the gear case castingis being used.

Azsquare bar 41 extends parallel to and above the bar 36, said barsbeing connected together and being connected to the frame work 23 bymeans of a head casting L2. The bar 4-1 receives a V-shaped slide-wayli-3 formed in the upper part of the gear case wall. An annular oil. capis secured to the gear case wall 30 outside the end of shaft 25, bymeans of bolts 4-5 so as to prevent leakage of oil out of said gear casepast said shaft 25. A suitable packing L7 is provided in the gear casewall. 81 about an annular flange 48 so as to prevent leakage of oil pastthe bearing 29.

A spiral gear 49 is mounted on H e shaft 25 and is secured to said shaftby means of a key 50. A spacer collar 51 extends between the hub of gear4L9 and the ball bearing 28. while a spacer sleeve extends between thehub of said gear -19 and the ball bearing 29 so as to accurately spacesaid. gear 49 to mesh correctly with a spiral. gear 58 which is socuredto a shaft 54 by means of a nut 55 and a key. Pins 56 and 57 extendtransversely through the sleeves 51 and 52, respe:tively and through thesl aft 25, said pins sowing to splash the oil up over the operating mechanism.

The shaft 54: has its axis extending vertically and provided withenlarged bearing section 59 which is rotatably received in a bearing 60formed in the partition 34. The shaft section 59 is provided withsuitable spiral oil grooves 61 which serve to continually work the oilupwardly. A small diameter section 62 is formed on the shaft 54; and aworm 63 is keyed to said sh csection 62. A thrust collar 64 is mountedon the shaft section 62 between. the won 1 68 and the hearing 60. Ahelical gear 66 secured to a horisupported in the walls of the gearcase.

Sleeves 70 and 71 on the shaft 67, accurately position the helical gear66 between bearings 68 and 69, so that said helical gear accurate lymeshes with the worm 63. A scoring wheel 72 and an annular trim mini:knife 73 are secured to one end of the shaft 67 by means of a nut M andspacing collars 75. The scoring wheel 72 is more fully disclosed in myaforesaid copending application.

' The gear meshes with a gear 76 which is mounted upon hollow shaft 77,the latter being rotatably mounted in ball bearings 78 and 79 supportedin the walls of the gear case. Collars 80 and 81 are mounted upon theshaft 77 so as to accurately space the" gear '2' 6 as it meshes with thepinion 66. A siaft 88 is concentrically supported within thehollow-shaft77 and has secured to its outer end an annular trimming knife 84 whichoverlaps the outer cutting edge of the trimming knife 73, with thechamfered edge of the paper passing between said trimming knives. Theshaft 88 is urged to the right, as seen in Fig. 5, by a compressionspring 85, so that the trimming knife 84 presses firmly against thetrimming knife 73 to give a clean cut. The spring 85 is retained betweena stub shaft 86 secured within the outer end of hollow shaft 77 by meansof a pin 87, and the end of shaft 8. A transverse slot 88 passes throughthe shaft 88 and a pin 89 passes through the shaft 77 and the slot 88.,being secured to said shaft 77. The pin 89 thuslimits the axial movementof shaft 83 within the hollow shaft 77. Splash arms 89a. are secured tothe gear 76 so as to insure a proper lubrication of the operatingmechanism.

An idler pressure roller 90 is mounted below the scoring wheel 7 2 so asto press the paper cover sheet- 11 against said scoring wheel. Theroller 90 is rotatably mounted upon a spindle 91, which is secured tothe outer end of a lever 92, the latter being pivotally mounted on apivot pin 93 which is secured to the fran'ie-wo-rk of the machine. Thelever 92 is prevented from axial movement on the pin 98, by means of acollar 94 having a split pin 95 passing transversely through the collar94 and the pin 93. In order to accurately adjust the vertical positionof the roller 90 so as to obtain the proper depth of score mark I adjustthe lever 92 about this pivot pin 93. ilhisadjustment is accomplished byproviding a fork 96 on the outer end of lever 92, said fork having atransversely extending recess 97 in its upper surface for receiving apin 98 which extends transversely through a vertically ex.- tending rod99. I A compression spring 100 is carried on the rod 99, being confi: edbetween a washer 101 bearing against the lower surface of the lever fork96, and a collar 102 slidably carried on said rod 99. The lower bolts127.

end of the rod 99 passes through an outstanding flange 103 formed on thesplit flange 37, and is threaded to receive an adjusting wheel 104. Thusby rotating the adjusting wheel 104, the position of the roller and thedepth of the score mark is accurately adjusted.

A pressure roller 105 is secured to a shaft 106 below the chamferingwheel 24 so as to press the paper edge 13 against said wheel. The shaft106 is arranged to be accurately adjusted vertically so as to get theproper depth of chamfer by the chamfering wheel 24. This adjustment isaccomplished by mounting the ends of said shaft 106 in a bearing block107, said block being slidably received in a slide bracket 108 securedto the gear case, by bolts 109. The lower end of the bearing block 107is provided with a threaded hole to receive an adjusting screw 11.0which passes through the slide bracket 108. A gear 111 is'secured to thelower end of each of the screws 110. A stub shaft 112 is rotatablyreceived in the lower wall of the gear case and is provided near itsmiddle with a gear 113 which is positioned between the two gears 111 andmeshes therewith. An adjusting wheel 114 is secured to the outer end ofstub shaft 112 so that when said adjusting wheel 114 is rotated thevertical position of the pressure roller 105 is accurately adjusted. Inorder to adjust the position of the two units or machines, one at eachedge of the paper cover sheet 11, so as to increase or decrease thedistance between them for different widths of board, I provide an adjusting rod 116, which passes through the head castings 42 and isrotatably supported in bearings 117 and 118 formed in said headcastings. A spacing collar 119, is mounted on one end of the rod 116,and is secured on said rod by a nut 120 screwed onto a threaded section121 on said rod 116. An adjusting hand wheel 122 is keyed on theopposite end of the rod 116, being secured thereto by a nut 123 so thataxial movement of the rod 116 is prevented. The rod 116 has a threadedsection 124 at one end withthreads of one hand and has a similarthreaded section near the opposite end with threads of the oppositehand. The threaded section 124 engages an. internally threaded nutbolted into the boss 125 formed in the gear case wall, by means of aflange 126 and tap The threaded section at the other end of rod116is'threaded into "a nut in a similar boss 125 of the companion unit ormachine. wheel 122, the distance between the machines is varied at will.

" also secured to the beams 130 by bolts Thus, by rotating the adjustingI A sleeve 133 is rotatably mounted within the bearing bracket 131, saidsleeve being provided with a pair of spaced apart, annular shoulders 134of smaller diameter upon which are seated ball bearing races 135 whichengage with the bracket 131 to rotatably support'said driving sleeve133. Collars 136 are screwed into the ends of the bearing bracket 131 soas to hold the ball races in position in said bracket.

A pair of co-axially arranged drive shafts. 137 pass through the gearcase walls and are, seated in ball bearings 138 and 139 which aresupported by said gear case wall. An oil cap 140 adjacent each bearing139 prevents leakage of oil, and nut 141 is screwed onto the end of theshaft 137 to retain the ball bearing in place. A helical gear 142 iskeyed to an enlarged section 143 of the shaft 137, being suitably spacedby collars 144 and 145 between the bearings 139 and 138 respectively.Thi helical gear 142 meshes with the helical gear 49 so that the driveshaft 137 causes the rotation of the shaft 25 with its associatedmechanisms. Each of the shafts 137 has a square end 146 which isslidably received inside of the similarly shaped bushing 147. Thisbushing has an annular exterior shape and is forced into place inside ofthe sleeve 133 and then brazed, so as to secure a driving connectionbetween the square shaft 146 and the sleeve 133. A pulley 148 is keyedonto one end of the sleeve 133, and is connected by one or more belts149 to a pulley 150 secured to the motor shaft 151 by a nut 152.

The grinding wheel 24 is enclosed by a casing 154 except for an opening155 which is arranged for clearance to permit the passage of the stripof paper 11. An opening 155a is provided in the upper part of thecasing'154 and is closed with a cover 156 held in place by a bolt 157 sothat the grinding wheel 24 may be dressed and so that inspection andcleaning of the case 154 is pos sible. A circular cover 158 is bolted bybolts 159 to the exterior face of the case 154 so that the grindingwheel 24 may be inserted in said case. An air outlet flange 160 isformed on.

the top of the case 154 and is connected by a duct 162 to an exhaust fannot shown, which is adapted to remove the particles of paper resultingfrom the chamfering of the paper cover sheets 11. Suitable blades or fanarms 163 are attached to the flange 48 so as to rotate with the shaft 25and prevent any accumulation of the particles of paper within thechamber 154.

An oil filling plug 165 is screwed into the top of the gear case and atube 166 extends upwardly ,from the gear case partition 34 beingprovided with an oil outlet opening 167 so as to maintain a constantlevel of oil above the partition 34. An oil outlet pipe 168 passesthrough the gear case wall and has an arm 169 extending downwardly toprevent dirt getting into the gear case and maintain a constant level ofoil above the gear case bottom 170. The mechanism inside the gear caseis thus supplied with suficient lubrication.

As the paper strip 11 passes from between the trimming knives 73 and84:, it passes outwardly, over a guide roller 171 and then around alarge roller 172 which reverses the direction of movement of the strip11. The paper strip 11 then contacts with a pair of folding brackets 173having folding recesses 17 i gradually tapering along an elongated lowerflange 17 5 of said brackets. The recesses 17 1 accomplish the downwardfolding of the fold 13 to engage an upturned fold let of the lower coversheet 10. One of the folding brackets 173 is provided with an upperintegral collar 175a which is threaded internally to receive a threadedsection 176 formed on an adjusting rod 177 which extends transversely ofthe board making machine. A similar, but opposite hand threaded section178 is formed near the opposite end of rod 17 7 for the purpose ofreceiving the companion folding device. Bearing collars 17 9 are formedintegrally in the frame members 23, said collars being shaped to receivebushings 180 held in place by set screws 181. These bushings 180rotatably receive the ends of the adjusting rod 177 which has smallerdiameter sections 182 for engagement with the inside of said bushings.An adjusting hand Wheel 183 is secured to one end of a rod section 182by a nut 18 1, so that the adjusting rod 177 is prevented from axialmovement by engagement of the ends of bushing 180 with the hub of handwheel 183 on one side, and the shoulder of the threaded section 178 onthe other side.

A sprocket pinion 186 is secured to the outer end of stub shaft 86, saidpinion being connected'by a chain 187 to a sprocket wheel 188 secured tothe end of shaft 106. The roller 105 is thus caused to rotate atsubstantially the speed. of the paper strip 11.

In operation, the paper cover sheet 11 passes around roll 20 and betweenthe grinding wheel 24 and the pressure roll 105, to form the chamferededge 15. The chamfered edge then passes between scoring wheel 72 andpressure roller which form the score mark 12, and also passes betweentrimming wheels 73 and 84 which trim the chamfered edge straight. Thepaper strip 11 then passes over roller 171 and around the large roller172 to engage with the folding recesses 17 1 of the folding brackets1.73 which turn the folr s 13 downwardly after receiving the plasticcore material 18.

The rotation of the grinding wheel 24 is accomplished by means of amotor 129 which is connected by belts 14-9 on pulley 150. with a pulley1 18 on driving sleeve 133, the lat 141-6. Gear 142 meshes with gear 19on shaft 25 on which the grinding wheel 24 is secured. To drive theshaft 67 upon which the scorin saw 72 and trimming knife 73 are secured,a gear 53 meshes with the gear 49, said gear 53 being secured onvertical shaft 54 and 59. form 63 is secured to the lower section 62 ofshaft 59 and meshes with a gear 66 se-.

cured to the shaft 67. A trimming wheel 84; is mounted upon shaft 83which is driven by gear 76 meshing with the gear 66.

Roller 90 is rotatably supported on the end of lever 92 which ispivotally mounted on pin 93, the exact height of roller 90 and depth ofscore mark 12 being accurately adjusted by means of a hand wheel104:operat ing on the end of lever 92. Pressure roller 105 is driven by achain 187 connecting stub shaft 86 with the shaft 106 carrying saidroller 105. Shaft 106 is supported in an adjustable bearing block 107whose vertical height is adjusted by rotating the adjusting wheel 114:.The distance between folding devices 173 may be accurately adjusted byretating the h and wheel 183, and the exact distance between the twocompanion units may be adjusted by adjusting hand wheel 122.

I would state in conclusion that while the illustrated exampleconstituted a practical embodiment of my invention, I do not wish tolimit myself precisely to these details, since manifestly, the same maybe considerably varied without departing from the spirit of theinvention as defined in the appended claims.

Having thus described my invention, 1 claim as new and desire to secureby Letters Patent:

1. In a strip treating machine, means for continuously moving a strip ofmaterial, a grinding wheel positioned adjacent anedge of said materialwith the axis of said wheel parallel to said strip of material, a rollerpr sitioned below the edge of said material adj acent said Wheel andadapted to press said material against said wheel, and means foradjusting the distance between said wheel and said roller.

2. In a machine for treating the edges of moving strip material, achamfering wheel having its axis parallel to'said strip of material andadapted to act on the edge of said strip to chamfer the same, and ascoring wheel adapted to form a score mark adjacent said chamfer-ededge.

3. In a machine for treating the edges of strip material. a chamferingwheel having its axis substantially parallel with the edge of saidstrip, said wheel being adapted to act ice on said edge to chamfer thesame, and means for trimming said chamfered edge.

e. In a machine for treating the edges of a moving strip 01" sheetmaterial, a chamfering wheel contacting with the edge of said strip andarranged with its axis substantially 7 parallel with said edge, meansfor trimming said chamfered edge, and means for forming a score mark insaid strip adjacent said chamfered edge.

5. In a machine for treating the edges of a moving strip of sheetmaterial, a treating machine positioned adjacent each edge of saidstrip, a chamfering wheel associated with each unit and adapted tochamfer each edge of said strip, an adjusting rod being adapted to berotated to vary the distance between said machines.

6. In a machine for treating the edge of a moving strip of material, achamfering wheel positioned adjacent an edge of said strip with its axisparallel to said strip and adapted to chamfer the same, a housingpartially inclosing said wheel, and suction means for withdrawing fromsaid housing particles of said strip removed by said chamfering whee 7.In a machine for treating the edges of a moving strip of material, achamfering wheel positioned adjacent each edge of said strip and adaptedto chamfer the edges there of, and means common to both wheels foraltering the distance between said chainfering wheels.

8. In a strip treating machine, a chamfer ing and scoring wheel adjacentan edge of said strip to chamfer the edge thereof, means for trimmingthe chamfered edges, and means for varying the distance between saidchamfering and trimn'ring units.

9. In a strip treating machine, a ohamfering and scoring wheelpositioned adjacent each edge of said strip so as to accomplish thechamfering and scoring of said edges,

' and means for varying the distance between said chamfering and scoringmeans.

10. In a machine for treating the edge of a moving strip of sheetmaterial, a chamfering and scoring wheel adjacent an edge of saidmaterial and adapted to accomplish the chamtering and scoring of saidedge, pressure rollers under the edge of said material and adapted topress said material against said chamifering and scoring wheel, and aninter-connecting drive between said rollers.

11. In a machine for treating the edges of a moving strip of material, atreating machine including a chamfering, scoring and trimming wheeladjacent an edge of said strip material, and driving means associatedwith said machine and adapted to accomplish the rotation of said wheels.

12. In a machine for treating the edge of a moving strip of material, aframe means, a plurality of horizontal slide bars in spaced,

parallel relation and supported by said frame means, and an edgetreating machine supported by said slide bars and adapted to be adjustedaxially of said bars.

13. In a treating machine for treating the edges of a moving strip ofmaterial, a chamfering wheel positioned adjacent an edge of said strip,a shaft supporting said chamfering wheel, with its axis parallel to saidstrip, a plurality of bearing blocks rotatably supporting said shaft,means for causing the r0- tation of said shaft and wheel, and means foradjusting the position of said bearing blocks relative to said edge.

14. In a machine for treating the edges of a moving strip of material,means for chamfering and scoring each edge of said material, foldingmeans adjacent each edge of said material and adapted to form a foldabout the score mark formed by said scoring wheel, and means common toboth of said folding means for adjustably varying the distance betweensaid folding means.

In a machine for treating an edge of a moving strip of material, arotatably mounted wheel adapted to engage the edge of said strip totreat the same, a lever pivotally mounted below said edge, a rollerrotatably mounted upon said lever and adapted to press said edge againstsaid treating wheel, and means for varying the distance between saidtreating wheel and said roller by rocking said lever about the fulcrumthereof.

16. In a machine for treating the edges of a moving strip of material, achamfering wheel and a scoring wheel rotatably mounted adjacent an edgeof said material, means for rotating said chamfering wheel, andintermediate gearing between said chamfering wheel and scoring wheel foraccomplishing the rotation of said scoring wheel.

17. In a machine for treating the edges of a moving strip of material, atreating machine including an edge chamfering, scoring and trimmingmeans operatively positioned adjacent an edge of said strip material andcombined as a unit driven from a single source of power.

- CLIFFORD E. IVES.

